6. No court shall take cognizance of any offence punishable under section 5 except upon complaint in writing made,-(a) in the case of an offence which is punishable both under this Act or the rules made thereunder and also, whether by confiscation or otherwise, under the Customs Act, 1969 (IV of 1969), by a Collector of Customs or by an officer of Customs authorised in writing in this behalf by a Collector of Customs, or (b) in the case of any other offence by the Chief Controller or by an officer authorised by him in writing in this behalf;and no court inferior to that of a Magistrate of the first class shall try any such offence.